D&D4 Wiki
Calculated assault
warlord attack 1

Target: one creature

Attack: Strength vs. AC

Hit: "1[W] + Strength modifier damage, and one of your allies within 5 squares of you gains a power bonus to damage rolls against the target equal to 1 + your Intelligence modifier until the end of the encounter. You can transfer the bonus to another ally within 5 squares of you as a minor action."[MP:104]

Calculated assault is a daily power available to warlords at 1st level.

Calculated assault is a reliable power, so its daily use is not expended when it doesn't hit.